Improvement in shaft-coupling



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VILLIMS. MCKINNEY, OF CINCINNATI; OHIO'.

l Lettefrs Patent No. 92,860, dated .hilf/.20, 1869.

IMPROVEMENT IN SHAFT-COUPLING;

The Schedule referred to in these Letters Patent andv making par: ofLhe'Bame.

devices, of -a cylindrical split bushing, which, by forci blecontraction in size, tightly embraces the ends of the shafts to becoupled.

In the accompanying drawings- Figure 1 is a perspective view of theseveral pieces of the coupling detached.

' Figure 2 is a cross-section of the coupling together, and in place onthe sliafting.

.A A are the'ends of the shafts to be coupled, which have key-seats cnt,as shown, for thc reception of' the key B.

I prefer to use the double-draught key'B for this connection, as shownin the accompanying drawings, andalso shown in my Letters Patent for shaft-coup lng, December 29, 1868.

The bushing C is designed to fit the ends of the shafts A A', extendingequally over th'e ends from the point where the shafts meet.

The interior of the bushing isA slightly key-seated at c to fit the topof the key Bjand is attened ontop at b lto form a seat for key D. l v

The bushing C is cnt or split at d, to allow of it i *MP- beingcontracted in size, the out being of suliicient width to permit thenecessary ccntraction.

The sleeve E fits snugly over the split bushing C, and is key-seated toreceive the key D.

are in place, is driven tightly in between thc outer sleeve E andinner-.bushing C, and being taper,l as shown, serves to contract thesize of the bushing C,

it is impossible for the shafts to be 'drawn from the coupling endwise.

I am 'aware thatcou'plings have been used in which the inner sleeve'orbushing is'split or cut, and made to contract in size, by being forcedendwise within an outer sleeve, the exterior of the inner'bushing andthe interior .of the outer sleeve being respectively turned and boredtapering and made to fit.

hand.

WM. S. MGKINNEY.

Witnesses: 1

THEO. H. J AMES,

CHARLES Prcknns.

The key D, when the other pieces of the coupling and compel it toclosely embrace the ends of the shafts When the key B is constructed inthe form preferred,

This is a complicated construction, inasmuch as it

